Troubleshooting Guide
- 108 -
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50*
Master
501
Slave1
502
Slave2
503
Slave3
504
ODU 3phase power omis-
sion error
Error
No.
Error Type Error Point Main Reasons
Omitting one or more of
R,S,T input power
1. Input Voltage abnormal (R,S,T,N)
2. Check power Line connection condition
3. Converter PCB damage
4. Converter PCB input current sensor fault
n Error Diagnosis and Countermeasure Flow Chart
* Measuring input voltage
* Noise filter wiring
* Field Fault Case
* R-Phase Terminal
Changed Color.
Is input voltage normal?
No
Yes
Recheck power and installation condition
Yes
Check
R~S/S~T/T~R phase voltage is 380V±10%
R~N/S~N/T~N phase voltage is 220V±10%
→ Check connection condition and wiring if power is
abnormal
Are there any power wire
connections normal?
No
Yes
1. Check R/S/T/N wiring conditions
→ Rewire them if abnormality found.
INV. PCB LED display error
No
Replace inverter PCB assembly.
Is Converter PCB assembly
normal?
No
1. Check R~N/S~N/T~N phase voltage is
220V±10%
2. Check Converter PCB assemblywire
disconnection and wiring
→ Reassemble if abnormality found
Yes
R S T N
R
S
T
N
R S
TN
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